Statistics. Determining the mean.

Hello! Can someone help me please with this exercise?

The Kentucky Derby is held the first Saturday in May at Churchill Downs in Louisville, Kentucky. The race track is one and one-quarter miles. The following table shows the winners since 1990, their margin of victory, the winning time, and the payoff on a $2 bet.

Determine the mean for the payoff on a $2 bet. (Round your Mean answers to 4 decimal places )

My answer for the mean of the payoff on a $2 bet is 29.8040, but it's not right!

Re: Statistics. Determining the mean.

It seems very strange that you would be asked to find the mean if you had never been given the definition of "mean"! Add all the numbers in the list under "$2 bet" and divide by the number of entries in the list.

Re: Statistics. Determining the mean.

Well, thank you! but i wanted to use frequency distribution, so i used 5 classes with the intervall of 23 and got this result. Still it should give the same result as i thought...it becomes easer to find out std.deviation afterwards...